Separator.



No. 726,000. PATENTBD APR. 21, 1903.

J. 'SLATTERY.

SEPARATOR.

APPLIOATION FILED SEPT.16, 1902.

I0 MODEL. E 2 SHEETS-SHEET 1.

WITNESSES: INVENTOR BY u ATTORNEYS No. 726,000. PATBNTED APR. 21, 1903.

- J. SLATTERY.

SBPARATOR.

APPLICATION FILED SBPT.16, 1902. I 7 no MODEL. 2 SHEETS-SHEET a.

' WITNESSES: INVENTOR j 7 ZTORNEYS UNITED STATES PATENT OFFICE.

JOHN SLATTERY, OF BROOKLYN, YORK, ASSIGNOR TO CHROME STEEL WORKS, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

SEPARATO R.

SPECIFICATION forming part of LetterslPatent 0. 726,000, dated April 21, 1903.

Application filed September 16, 1902. Serial No- 123,584. (No model.)

To all whom it may concern: wheels carry-heavy loads, are subjected to Be it known that I, JOHN SLATTERY, a citisevere shocksas, for example, when a heavzen of the United States, residing in the borily-loaded car passes rapidly over switches ough of Brooklyn, in the city of New York, and crossingsand are also subjected to wear 5. State of New York, have invented certain through the action of brake-shoes upon them.

new and useful Improvements in Separators; So far as strength and toughness are conand I do hereby declare the following to be cerned cast-steel is a desirable material for a specification of the invention, such as will" such wheels; but it is not practicable by any enable others skilled in the art to which it perof the customary methods of casting to pro- 1o tains to make and use the same. d'uce a steel wheel having a tread-surface My invention relates to a separator to be hard enough to resist the wear and blows due used in the casting of cast-steel car-wheels topassingoverrailjoints,switches, crossings, and the like for separating the steel from and the like and the wear of the brake-shoes which the rim is formed from that from which and at the same time havinga hub soft enough r 5 the body or hub portion of the wheel is formed; to be bored for the reception of the axle. For

and it consists in the novel construction of this and other reasons the wheel most comsuch separator whereby the rim and body monly used is a cast-iron wheel having a or hub portions of the wheel'are interlocked chilled tread-surface; but it has been found when cast and in the combination of such that such wheels are not strong enough for 2o separator with the mold. modern heavy-tonnage cars, and, moreover,

The objects of my invention are to produce chilled cast-iron, though hard, is not tough and a cast-metal wheel having rim and body or wears away more rapidly than is desirable unhub portions cast from difierent grades or der the action of the brake-shoes, and, morekinds of metal, but mechanicallyinterlocked, over, chilled-cast-iron wheels often contain 25 so as to be incapable of separation, and to do soft spots, which wear away rapidly, producthis by simple and inexpensive apparatus. ving flat wheels.

I will now proceed to describe my inven According to my invention I cast the rim tion with reference to the accompanying portion of the wheel from a harder grade of drawings, in which one form of my separator steel than that from which the body or hub 0 and the manner of using the same are illusportion is cast. The mold'employed is made trated, and will then point out thenovel feain the ordinary manner; but before the moltures in claims. I t'en metal is poureda separator-ring is intro- In the said drawings, Figure 1 shows a duced' into, the rim portion of the mold in cross-section of a car-wheel mold and of my such manner as to divide the same into two 3 5 improved separator therein, one side of the portions, for which separate 1 gates are pro mold being shown as if filled with metal, the .vided. Both grades of ',steel are poured todifferent qualities of the metals on opposite gether, or nearly so, but the separator keeps sides of the separator being indicated by difthem apart, confining the harder steel to the ferent sectioning. Fig. 2 shows a horizontal outer portion of the rim-mold, It is neces- 40 section of the upper portion of the mold, sary that the two portions of the wheel thus showing the separator therein. Fig. 3 shows formed shall be firmly united, so that sepaa top view of a portion of this separator as ration thereof may be impossible. For this first formed and before it is bent. Fig. 4 purpose the separator is providedwith corshows a similar view of a portion of the separugations, forming recesses, by means of 5 5 rator after'it has been bent into a circle. Fig. which interlocking serrationsare' formed in 5 shows a perspective View of a portion of the adjacent faces of the rim and body porthe separator. tions of the wheel, and the; separator is also It .is desirable vtha t car.- wheels shall be provided with circumferential recesses and formed of some very tough and strong matecorresponding projecting bosses, by whichlat- 5o rial and that they shall have a hard and dueral separation of the two parts of the wheel rable tread -surfaoe. This is because caris prevented.

Referring now to the drawings, the mold shown in Fig. 1 is of ordinary construction, consisting of an upper portion or cope 1 and a lower portion or drag 2, the mold being arranged to part at the flange-line of the wheel, as is ordinarily the case. The pattern by which the mold is formed may be of any desired form, according to the form to be given to the wheel.

The separator-ring 3 divides the rim portion'of the mold into two concentric chambers 4 and 5, for which separate gates 7 and 8 are provided, the latter also supplying the metal to the hub-space (3. The separator is embedded preferably in the lower portion of the mold, so as to be supported thereby. This separator-ring may be formed of thin metal, preferably of sheet-iron, and is corrugated, as shown, having faces 9 and 10, the form of which is substantially that of arcs of circles concentric with the mold connected by angular recntrant portions 11. When the molten metal is poured into the mold on both sides of the separator, the adjacent faces of the parts of the wheel thus formed assume the form of interlocking fan-shaped serrations, which, in fact, dovetail the two parts of the wheel together. These serrations prevent rotary motion of one part of the wheel with respect to the other and also prevent any portion of the rim from flying off in case it should be broken. The separator-ring is also provided with circumferential bosses 12 and corresponding recesses 13, which are filled by the molten metal, and thereby the two parts of the wheel are interlocked against separation by lateral movement.

In casting the wheel after the mold has been formed and the separator inserted molten metal of the. character from which the hub portion of the wheel is to be formed is poured into the hub portion of the mold through the gate 8, and at the same time, or approximately so, the molten metal for the rim is poured into the mold through the gate 7. The separator keeps the two metals from mixing. It also acts as a mold to produce the interlocking serrations,by which the rim and body of the wheel are interlocked and secured together.

In practice a more or less perfect Weld will usually be formed between the rim and body portions of the wheel and the separator, the latter being raised to the welding-point or even fused by the heat of the molten metal; but it is difiicult to insure a perfect weld in this manner, and since the slightest imperfection in the weld between the rim and body would render the wheel dangerous were not the parts locked together mechanically it is necessary to interlock the parts, as above described. Because of the shape of the interlocking serrations and the contraction of the metal in cooling the parts of the wheel are secured together mechanically as firmly as could be the case were there a perfect Weld between them.

After the wheel is formed as above described and removed from the mold the portion of the separator projecting therefrom may be removed. Ordinarily the wheel is then allowed to cool and is subsequently reheated and pressed between suitable dies.

The separator-ring is preferably formed by rolling or pressing it out of sheet metal in the shape shown in Fig. 3, the corrugations being rectangular. It is then bent into circular form and the ends riveted or otherwise fastened together, and as it is so bent the portions 11, connecting the faces 9 and 10, necessarily assume the reentrant positions shown.

It is obvious that the separator may be given various forms, that it may be used in the making of articles other than wheels, and that it is not restricted in its use to the casting of steel articles, but maybe used for separating other metals as the same are cast and metals of dilferent kinds. I do not limit myself, therefore, to the particular form of separator shown or to its use in making steel castings.

Having thus completely described my invention, what I claim, and desire to secure by Letters Patent, is-- 1. A separator for use in molds, consisting of a piece of thin metal having corrugations certain of which are reentrant and are thereby transverse to separation of articles, cast on opposite sides of said separator, in directions normal to the adjacent surfaces of articles so cast, said corrugations constituting projections which are transverse to motion in two other directions at right angles, said corrugations and their complementary recesses adapted to form interlocking serrations on the adjacent faces of articles cast on opposite sides of said separator.

22. A separator for use in molds, consisting of a piece of thin metal having rentrant corrugations or recesses adapted to form interlocking serrations on the adjacent faces of articles cast on opposite sides of said separator, and having also other recesses which, when filled by the molten metal in casting, key the articles so cast against separation in the direction of said corrugations.

3. The combination with a mold, ofa separator therein having rentrant corrugations or recesses adapted to form interlocking serrations on the adjacent faces of articles cast on opposite sides of said separator, and having also other recesses which, when filled by the molten metal in casting, key the articles so cast against separation in the direction of said corrugations.

The combination, with aWheel-mold, of a separator-band therein, serving to prevent molten metal poured on opposite sides thereof from mixing, said separator consisting of a band of thin metal having corrugations forming projections which are transverse to relative circumferential or axial motion of one part of the wheel with respect to the other part, certain of said corrugations being reentrant, said corrugations and their complementary recesses adapted to form interlocktor having transverse rentrant corrugations, I0 ing serrations on the adjacent faces of articles and other recesses, all arranged to be filled cast on the opposite side of said separator. by the molten metal and thereby to bind to- 5. The combination,withacar-Wheel mold, gether and mechanically interlock the two 5 of a separator-band in the rim portion of said portions of the wheel so cast.

; mold, serving to prevent molten metal poured J OI-IN SLATTERY; on opposite sides thereof from mixing, said Witnesses:

mold having gates leading to the spaces on C. F. CARRINGTON,

both sides of said seperator, and said separa- H. M. MARBLE. 

